Unless he's playing the long game where he is betting the farm on a Trump victory, and is trying his best to not antagonize him.

Which seems more likely than him being ruled by a small impact on a few months of ad revenue.

This is a good take and one I also think is likely. Maybe Zuckerberg saw what happened to Google.

Google essentially bet the farm on a Clinton win (Schmidt was directly helping the campaign). Fast forward to today, Google is under dozens of anti-trust investigations and has been iced out of all Washington influence.